Zinc oxide nanoparticles are obtained by a wet chemical method using zinc sulphate as a raw material. Doping sepiolite, micro-fibrous inorganic clay, with ZnO after precipitation under basic conditions and subsequent thermal treatment is investigated as both materials are abundant. They are used for the development of humidity and gas sensors of great environmental importance. The particle size...

A mesoporous hybrid silicate microsphere with superior adsorption performance has been successfully synthesized by employing an "all-into-one" strategy and a simple one-pot hydrothermal process using naturally abundant low-grade red palygorskite (PAL) clay as raw material in the presence of non-toxic SiO32- and Mg2+ ions. As is expected, both the PAL and associated minerals transformed into a n...

Formulation of traditional hard porcelain generally requires 50% kaolin, 25% silica and feldspar. Four porcelains formulation using the casting method, were prepared with different percentages kaolinitic clay, sand pegmatite referenced respectively NONG, SAB PEG. The physico-chemical, mechanical mineralogical characteristics evaluated on specimens formulated sintered at temperatures from 1200?C...

Raw clays, extracted from Bana, west Cameroon, were modified with semiconductors (TiO2 and ZnO) in order to improve their depollution properties the addition of photocatalytic properties. Cu2+ ions also added clay by ionic exchange increase specific surface area. This insertion Cu was confirmed ICP-AES. The presence TiO2 ZnO detection anatase wurzite, respectively, using X-ray diffraction. comp...

Effective pretreatment of spectral reflectance is vital to model accuracy in soil parameter estimation. However, the classic integer derivative has some disadvantages, including spectral information loss and the introduction of high-frequency noise. In this paper, the fractional order derivative algorithm was applied to the pretreatment and partial least squares regression (PLSR) was used to as...